Some really nice stuff in the latest version (gpu acceleration, the navigation framework, assembly caching, etc) Tim Heuer has a good post on whats new since the beta:
http://feeds.timheuer.com/~r/t...s-new-and-changed.aspx
Also, componentart is holding a contest for silverlight apps (all versions, not just 3) with $10,000 up for grabs:
http://www.componentart.com/community/competition2009/ Anyone have a submission in there? Lets see what the anandtech effect can do I have a project I've been procrastinating on, maybe this will be the motivation I need.
Edit: I can't believe I forgot SketchFlow. We got a sneak peak at an MSDN dev conference and it is quite impressive. To be able to sketch out a UI/workflow, turn that into an intranet site for feedback in a click, and then a word document to distribute.. that should save so much time!